Problems are not stop signs, they are guidelines.
The secret of getting ahead is getting started.
The dog that trots about finds a bone.
You never know what motivates you.
Quality is not an act, it is a habit.
Never complain and never explain.
Be kind whenever possible. It is always possible.
Things do not happen. Things are made to happen.
Always desire to learn something useful.
Do not weep do not wax indignant. Understand.
To summarize, the particular song a male sings, and the behavioral responses of females to song and morphological signals, are not genetically inherited in a fixed manner but are determined by learning early in life.